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| Number | Title | Issue Date |
| 7888986 | Method of controlling a rectifying bridge in a diode mode and a circuit for the control A method and a circuit for controlling a thyristor (V1) into conducting state, the thyristor (V1) being in a rectifier, which rectifier supplies DC voltage to a DC voltage circuit. The circuit comprising a trigger capacitor (C2) adapted to be ch... | 02/15/2011 |
| 7352233 | Efficient thyristor-type power switches The highest-power switches now available are based on thyristor-type devices: GTOs (Gate turn-off thyristors), MTOs (MOS controlled turn-off thyristors), IGCTs (Integrated gate commutated thyristors), and the new ETOs (Emitter turn-off thyristors). These devices han... | 04/01/2008 |
| 7291984 | Method of reducing RMS load voltage in a lamp using pulse width modulation A method of converting a line voltage to an RMS load voltage in a lamp includes modulating a load voltage with a pulse width modulation circuit that is entirely within the lamp and provides an RMS load voltage to a light emitting element of the lamp. Conduction is t... | 11/06/2007 |
| 7274149 | Lamp with integral pulse width modulated voltage control circuit A lamp has a voltage controller that converts a line voltage to an RMS load voltage suitable for operation of the lamp's light emitting element, where the voltage controller is entirely within a lamp base and uses pulse width modulation to define the RMS load voltag... | 09/25/2007 |
| 7274148 | Lamp having fixed forward phase switching power supply with time-based triggering A lamp contains a lamp voltage conversion circuit that is entirely within a base for converting a line voltage at a lamp terminal to an RMS load voltage at a light emitting element. The voltage conversion circuit includes a forward clipping circuit with a three-term... | 09/25/2007 |
| 7265740 | Suppression of leakage current in image acquisition In a manufacturing process of a display device, hydrogenation in an I layer of photodiodes D1 and D2 is progressed less than that in a channel portion of a pixel TFT, and a defect density due to dangling bonds not terminated in the I layer of the photo... | 09/04/2007 |
| 7259407 | Isolated HF-control SCR switch A vertical SCR switch to be controlled by a high-frequency signal having at least four main alternated layers. The switch includes a gate terminal and a gate reference terminal connected via integrated capacitors to corresponding areas. In the case of a thyristor, h... | 08/21/2007 |
| 7224130 | Method of operating a lamp containing a fixed phase power controller A method of operating a lamp that has a power controller connected between a terminal and a light emitting element that converts the line voltage to an RMS load voltage. An input to an analog control block is provided in the controller that is independent of a chang... | 05/29/2007 |
| 7218054 | Lamp having fixed phase power controller with analog trigger A lamp which includes a fixed phase power controller connected between a terminal and a light emitting element converts line voltage to an RMS load voltage. The controller has an analog control block that receives an input that is independent of a change in magnitud... | 05/15/2007 |
| 7199532 | Lamp containing phase-control power controller with analog RMS load voltage regulation A lamp includes a phase-control power controller within the lamp. The phase-control power controller includes an analog load voltage sensor that provides an optical output related to an RMS load voltage and a phase-controlled dimming circuit that has a comparison ci... | 04/03/2007 |
| 7180762 | Cascoded rectifier A high voltage rectifier device exhibiting low forward resistance and fast switching time formed of a high voltage structure connected in a cascode configuration with a low voltage structure. The high voltage structure is a bidirectional normally on semiconductor sw... | 02/20/2007 |
| 7170231 | Lamp that sets desired RMS load voltage with variable pulse width modulation A lamp includes a voltage controller that converts a line voltage to a desired RMS load voltage. The voltage controller is entirely within a lamp base and uses pulse width modulation to define the RMS load voltage. The voltage controller has a feed-back circuit that... | 01/30/2007 |
| 7170236 | Method of setting desired RMS load voltage in a lamp A method of converting a line voltage to a desired RMS load voltage in a lamp includes the steps of pulse width modulating a load voltage with a pulse width modulation circuit, triggering conduction in the pulse width modulation circuit independently of a line volta... | 01/30/2007 |
| 7166964 | Lamp containing pulse width modulated voltage conversion circuit A lamp includes a voltage conversion circuit entirely within a lamp base. The voltage conversion circuit includes a pulse width modulator for modulating a lamp load voltage and provides a load voltage to a light emitting element. A feed-back circuit adjusts the puls... | 01/23/2007 |
| 7148660 | System and method for power conversion using semiconductor switches having reverse voltage withstand capability A power converter system is provided for supplying power to an electrical load. The power converter system includes a power converter circuit adapted to perform an AC to DC power conversion and an active clamp circuit coupled to the power converter circuit for regul... | 12/12/2006 |
| 7102864 | Latch-up-free ESD protection circuit using SCR A latch-up-free ESD protection circuit using SCR is disclosed, in which an SCR is connected between the input pad and the negative power supply; a turn-on switch and a turn-off switch are connected between the positive power supply VDD (or the input pad) ... | 09/05/2006 |
| 7084692 | Control of a thyristor of a rectifying bridge A method and a circuit for controlling at least one thyristor constitutive of a rectifying bridge with a filtered output, including closing the thyristor when the voltage thereacross becomes greater than zero, and making the gate current of the thyristor disappear w... | 08/01/2006 |
| 7082041 | Power supply filtering A power supply is filtered while the amount of in-rush current required by the capacitive charging of the filter is limited. A resistor may be placed in parallel with a relay where the parallel combination is in series with the filtering capacitor. The relay is open... | 07/25/2006 |
| 7072196 | Multi-stage high voltage solid state switch A method for triggering a high voltage solid state switch comprised of a set of thyristors connected in series. Initiating switch turn-on requires command triggering of only the lowest voltage thyristor, thereby eliminating the need for expensive high voltage pulse ... | 07/04/2006 |
| 7049750 | Lamp having integral voltage controller A lamp includes a voltage conversion circuit that converts a line voltage to a desired RMS load voltage. The voltage conversion circuit is entirely within a lamp base and uses pulse width modulation to define the RMS load voltage. The voltage conversion circuit incl... | 05/23/2006 |
| 7034473 | Phase-control power controller for converting a line voltage to an RMS load voltage A phase-control power controller that converts a line voltage to an RMS load voltage includes a phase-control circuit connected to the line and load terminals and having an RC network that clips the load voltage. A load sensing circuit is connected across the load t... | 04/25/2006 |
| 6952297 | Method of differentially connecting photonic devices A method and apparatus are provided for driving an electro-optic converter assembly with an information signal. The method includes the steps of disposing a resistor having a resistance substantially equal to a resistance of the electro-optic converter adjacent the ... | 10/04/2005 |
| 6952335 | Solid-state DC circuit breaker A high-speed, solid-state circuit breaker is capable of interrupting high DC currents without generating an arc, and it is maintenance-free. Both the switch and the tripping unit are solid-state, which meet precise protection requirements. The high-speed, solid-stat... | 10/04/2005 |
| 6914350 | Switching arrangement A solid state switching arrangement includes a transmission line which acts as a primary transformer loop and acts with secondary windings carried by switching modules to apply triggering signals to the switches. The arrangement may include greater than sixty module... | 07/05/2005 |
| RE38734 | Semiconductor switching apparatus and method of controlling a semiconductor switching element An inductance in a path (R1) from a gate electrode (3G) of a GTO (3) through a gate driver (4) and a node (13) to a cathode electrode (3K) is determined so that a turn-off gain may be not more than 1. At a turn-off, a main c... | 05/17/2005 |
| 6710639 | Emitter turn-off thyristors and their drive circuits A family of emitter turn-off thyristors and their drive circuit comprise a gate turn-on (GTO) thyristor, a first switch, the drain of the first switch being connected to the cathode of the GTO thyristor, and a second switch connected between the gate of the GTO thyr... | 03/23/2004 |
| 6624684 | Compact high voltage solid state switch A compact, solid state, high voltage switch capable of high conduction current with a high rate of current risetime (high di/dt) that can be used to replace thyratrons in existing and new applications. The switch has multiple thyristors packaged in a sing... | 09/23/2003 |
| 6462605 | Low-jitter high-power thyristor array pulse driver and generator A method and apparatus for generating low-jitter, high-voltage and high-current pulses for driving low impedance loads such as detonator fuses uses a MOSFET driver which, when triggered, discharges a high-voltage pre-charged capacitor into the primary of ... | 10/08/2002 |
| 6426666 | Diode-assisted gate turn-off thyristor A gate-controlled switch includes a gate turn-off thyristor in series with a diode. By using the diode in series with the GTO, the switch significantly increases the turn-off voltage that can be used for the current commutation. The unity turn-off gain an... | 07/30/2002 |
| 6417719 | Apparatus and method for isolating a trigger circuit of a silicon-controlled rectifier An apparatus for isolating driver circuits from silicon-controlled rectifier (SCR) circuits in an electric switch. The driver circuits are located on a driver-board, which includes an infrared (IR) emitter. The SCR circuits are located on a SCR switch-boa... | 07/09/2002 |
| 6339231 | Gate commutated turn-off thyristor module A gate terminal plate (1) of a GCT thyristor (90), a connecting substrate (70) of a driving device and a cathode electrode plate (10) are interposed between a set of metal rings (7A) and (7C) fastened to each other with a screw (8). The cathode electrode ... | 01/15/2002 |
| 6323718 | Normally-on bidirectional switch The present invention relates to a normally-on bidirectional switch, including, in parallel between two power terminals of the switch, a first cathode-gate thyristor, the anode of which is connected to a first power terminal, a second anode-gate thyristor... | 11/27/2001 |
| 6268754 | Gate driving circuit for power semiconductor switch A gate driving circuit for power semiconductor switch including a DC voltage source whose positive output terminal is connected to a cathode of a power semiconductor switch, a series circuit of a reactor and a turn-on switching element connected across the pos... | 07/31/2001 |
| 6218881 | Semiconductor integrated circuit device A semiconductor integrated circuit device has an output circuit formed in a CMOS structure and composed of a P-channel MOS transistor that has its gate connected to an input terminal, has its source connected to a power source line, and has its drain conn... | 04/17/2001 |
| 6188267 | Normally conducting dual thyristor The present invention relates to a component forming a normally on dual thyristor, which can be turned off by a voltage pulse on the control electrode, including a thyristor, a first depletion MOS transistor, the gate of which is connected to the source, ... | 02/13/2001 |
| 6163200 | Gate driver device for GTO thyristor In a gate driver device, cathode conductor 2, gate conductor 3, and positive and negative conductors 8 and 9 between the principal turn-on and turn-off capacitors and MOSFET switching elements Q11-Q1i and Q21-Q2j are disposed on a wide plate. A thin insul... | 12/19/2000 |
| 6160439 | Current feed control circuit and electronic appliance using the same The constitution includes a heater 2 used as current receiving element, a thyristor 3 placed in the current travelling route of the heater 2, a series connection circuit of a capacitor 4 and diode 5 for control power source connected parallel to the thyri... | 12/12/2000 |
| 6054891 | Solid state relay A solid state relay includes a power semiconductor controlled by a gate electrode. A current detector provides a signal which is a function of the absolute value of the current through the power semiconductor. An evaluation circuit coupled to the current ... | 04/25/2000 |
| 6046614 | Drive circuit having a power recovery system A drive circuit for driving scanning lines or data lines in an EL or plasma display panel has a pair of power recovery lines each connected to a corresponding one of two thyristors. The first thyristor recovers electric power from the scanning line and th... | 04/04/2000 |
| 6028471 | Switching device with parallel switch A switching device has a control section to transfer a gate control signal which switches plural thyristors from an ON state to an OFF state after a parallel switch is open and an opening degree of the parallel switch is met where no arc discharge is gene... | 02/22/2000 |
